Roller-bearing for rocker-rings.



R. SIEGFRIED. ROLLER BEARING FOR. ROCKER RINGS.

APPLIOATION FILED MAY 1, 1005.

Patented J an. 26, 1909.

2 SHEETS-SHEET 1.

WITNESSES:

ATTdRNEY mountinfs and bearings for 1 else elaborate and UNITED STAT ROBERT SIEGFRIED, OF PITTSBURG,

IEXRSYLVA X I.\, AHBIHNOR ES OFFICE.

ROLLER-BEARING- FOR ROCKER-RINGS.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed. Kay 1, 1905. Serial No. 258,396.

To all whom it may concern:

A roller chain 12 which is located at the Be it known that 1, ROBERT SIEGFRIED, a i bottom of the field magnet frame 1 in the citizen of the United States, and a resident of Pittsburgfln the county of Allegheny and State of Pennsylvania, have invented a new 1 and useful Improvement in Roller-Bearings for Rocker-Rings, of which the following is a specification.

My invention relates to means for mounting infrequently moved or rotated parts and particularly to means for mounting the rockerthat an port the commutator brushes 0 dynamo e ectric machines.

My invention has for its object to provide machine members of a. e dimensions and great Weight which sh be of such character that the members may be easily moved.

In the larger sizes of direct current dynamo electric machines, the rocker-rings that carry the commutator brushes are of such IaEe dimensions and great we ht that great di culty has been experience in effecting adjustment of the commutator brushes, or expensive means have been employed for the purpose.

It is the usual practice to provide the rocker-rings of dynamo electric machines with c lindrical or annular faces that correspon to similar faces on the field magnet frame with which they are adapted to engage, and according to my invention, friction between the engaging faces is reduced by means of roller bearings, the novel features of which will be now described with reference to the accompanying drawings, in which- Figure 1 is a view in side elevation of a dynamo-electric machine embodyinf my invention. Fig. 2 is a cross-sections view of the machine shown in Fi 1, in a plane indicated by the lines 11-h, and m a is a view of a chain which constitutes one of the elements of my invention.

Referring to the drawings one end of a field magnet frame 1 is rovided with an annular recess to receive t e rocker-ring 6, the surfaces 4 and 5 of which are in engagement with or in close proximity to the corresponding surfaces 2 and 3 of the recess. The rocker-ring is held in position by a series of pins 7, 8, 9 and 10, which project into a circumferential groove or channel 11 and are spaced substantially at ecplal intervals around the circumference of t o ring 6.

groove 11, cmnprises a plurality of rollers 13 and connecting links 14, both of which are mounted on a series of pivot nos 15, the chain being so constructed with respect to the groove 11 that it is free to move therein. The diameter of the rollers 13 is slightly greater than the depth of the groove 11 so that the rocker-ring 6 rests upon the rollers and may readily be rotated, bv any convenient means, through a suliicient angle for adjustment of the brushes which may be supported upon the rocker-ring 6, in the usual manner.

A suitable means for rotating the rockerring 6 comprises a screw-threaded shaft 18 which is mounted on the frame 1 in a bearing 19 and e ages a swivel nut 20 on the rocker-ring 6, t e shaft 18 being actuated by a hand-wheel 21.

Although I have, for convenience, shown and described a specific arrangement of devices and a single application to a dynamoelectric machine, I desire it to be understood that all variations in size, form or arrangement of arts which do not materially affect the resu ts obtained are within the scope of my invention and that its application is in no way limited to any specific form or class of machine.

I claim as my invention:

1. In a dynamo electric machine, the combination with a stationary frame havin an annular end recess and a circumferentirfi save or channel, of a movable rocker-rm located in said recess, a roller chain locate in the said oove or channel at the bottom of the mac inc, and guide pins projecting frolm the rocker ring into the groove or channe 2. In a dynamo electric machine, the combination with a stationary frame havin an annular end recess and a circumferentirs channel, of a movable rocker-ring located in said annular recess, a chain located in the said channel at the bottom of the machine to support the weight of the movable ring, and comprising a plurality of rollers, ivots and connecting links, and uniform y spaced ide pins projecting from the rocker ring into the channel.

3. In a dynamo electric machine, the combination with a stationary frame havin an annular end recess and a circumferenti ehnnnel, of ii movable rocker-ring located in said recess, n roller chitin located 111 the sand channel ILL the bottom of the maclnne and eonsisting of n plurality. of rollers rotatably mounted on pins and connected by a series of links, and guide pro ections on the rockernng that engage the channel without interfering with the movement of the roller (-huin. 5

4. .In a dynamic-electric machine, the rcnibinution with a stetioner 1 field magnet frame having an annular en recess and e circuml'erei'itml channel, of a relatively movable rocker-ring roller chain locate in the said channel at 1.5 the bottom of the machine to support the seated in said recess, a

rocker-ring and comprising a plurality of rollers rotatably mounted on pins and c0nnected by a series of spacin links, and guide pins uniformly disposed it out the rocker- 1 ring to engage the channel without intcrferl ing with the movement of the roller chain or i the rocker-ring.

In testimony whereof, I have hereunto l siggscribed my name this 28th day of April,

ROBERT SI'EGFR IED.

Witnesses EDWIN TIDLUND, BIRNEY HINES. 

